PHP打印预览PDF

// 打印预览
    public function printExternal(Request $request){
    
    
        //数据处理
        $id = $request->id;
        $data = PactContract::where(['id'=> $id])->with(['foreign','order'=>function($q){
    
    
            $q->with(['client_dept']);
        },'contract_list'=>function($q){
    
    
            $q->with(['details']);
        }])->first();
        $arr = [];
        foreach ($data->contract_list as $k => $v){
    
    
            foreach ($v->details as $k3 => $v3){
    
    
                $nations[] = $v3->nations->country_store->abbr;
            }
            $arr[$k]['total'] = $v->total;
            $arr[$k]['price'] = $v->price;
            $arr[$k]['total_sum'] = $v->total*$v->price;
            $arr[$k]['nations'] = implode(',',$nations);
            $arr[$k]['currency_abbr'] = account_type_v()[$data->currency];
        }
        $nalist = $arr;
		// 或者是导出还是预览，1预览2导出
        $pdf = new \TCPDF('P'); // L - 横向 P-竖向
        // 设置文档信息
        $foreign_name = foreign_trade()[$data->foreign->foreign_id]['name'];
        $pdf->SetCreator($foreign_name);
        $pdf->SetAuthor($foreign_name);
        $pdf->SetTitle($foreign_name);
        $pdf->SetSubject($foreign_name);
        $pdf->SetKeywords('TCPDF, PDF, PHP');
        // 设置页眉和页脚信息
        // $pdf->SetHeaderData('tcpdf_logo.jpg', 30, 'XX公司', 'XX制造', [0, 64, 255], [0, 64, 128]);
        $pdf->setFooterData([0, 64, 0], [0, 64, 128]);
        // 设置页眉和页脚字体
        $pdf->setHeaderFont(['stsongstdlight', '', '10']);
        $pdf->setPrintHeader(false);
        $pdf->setPrintFooter(false);
        $pdf->setFooterFont(['helvetica', '', '8']);
        // 设置默认等宽字体
        $pdf->SetDefaultMonospacedFont('courier');
        $pdf->setCellPaddings(10, 0, 10, 15);
        // 设置间距
        $pdf->SetMargins(10, 5, 10);//页面间隔
        $pdf->SetHeaderMargin(0);//页眉top间隔
        $pdf->SetFooterMargin(0);//页脚bottom间隔
        // 设置分页
        $pdf->SetAutoPageBreak(true, 25);
        // set default font subsetting mode
        $pdf->setFontSubsetting(true);
        //设置字体 stsongstdlight支持中文
        $pdf->SetFont('stsongstdlight', '', 10);
        ob_clean();
        //第一页 导出的页面
        $view = \View::make("temp.contract.contract", ['data' => $data,'foreign_name'=>$foreign_name,'nalist'=>$nalist]);
        $html = $view->render();
        $html = preg_replace("/\s\s+/", '', $html);
        $pdf->AddPage();
        $pdf->writeHTML($html, true, false, true, false, true);
        $pdfName = '成交确认书' . $data->order->order_no;
        //输出PDF
        $pdf->Output($pdfName . '.pdf', 'I');//I输出、D下载
//        if ($type == 1) {
    
    
//            $pdf->Output($pdfName . '.pdf', 'I');//I输出、D下载
//        } else {
    
    
//            $pdf->Output($pdfName . '.pdf', 'D');//I输出、D下载
//        }
    }